Gaya APA
Wittmer, A. et al (2014).
Aviation Risk and Safety Management (E-Book) .
LONDON:
Springer-Verlag Berlin Heidelberg.
Gaya MLA
Wittmer, Andreas. et al.
"Aviation Risk and Safety Management (E-Book)".
LONDON:
Springer-Verlag Berlin Heidelberg,
2014.
Text.